body {
	margin: 10px auto;
	width: 570px;
	font: 75%/120% Arial, Helvetica, sans-serif;
}
.menu {
	margin: 100px 0 0;
	padding: 0;
	list-style: none;
}
.menu li {
	padding: 0;
	margin: 0 2px;
	float: left;
	position: relative;
	text-align: center;
}
.menu a {
	padding: 14px 10px;
	display: block;
	color: #000000;
	width: 144px;
	text-decoration: none;
	font-weight: bold;
	background: url('http://www.wangyexx.com/uploads/allimg/120614/button.png') no-repeat center center;
}
.menu li em {
	background: url('http://www.wangyexx.com/uploads/allimg/120614/hover.png') no-repeat;
	width: 180px;
	height: 45px;
	position: absolute;
	top: -85px;
	left: -15px;
	text-align: center;
	padding: 20px 12px 10px;
	font-style: normal;
	z-index: 2;
	display: none;
}